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MS-Dos Interview Questions in 2021

Microsoft produced the MS-DOS operating system. It is a command-line-based non-graphical operating system for x86-based computers. MS-DOS was a popular operating system in the 1980s, but it is no longer widely used. Its command shell, also known as the Windows command line, is still in use due to its widespread user adoption. It allows users to access, manage, and open files on their computers using a quick command line rather than a graphical user interface (GUI). We’ll go through a set of MS-DOS questions in more detail here for your cognizance, ensuring your performance in your upcoming interview.

1. What is MS-DOS, and state its uses?

Ans: MS-DOS is an acronym for Microsoft Disk Operating System, a non-graphical command line operating system derived from 86-DOS and designed for IBM-compatible computers. MS-DOS was created by Tim Paterson and was first released in 1981. MS-DOS was a popular operating system in the 1980s, but it is no longer widely used.

Before the introduction of GUI-based programs, Personal Computer widely used MS-DOS. It uses few resources and has a high level of consistency because it is a command-line-based system. It manages the disk's essential accountability, such as arranging, transferring, copying, finding, storing, and retrieving data.

2. List some features of MS-DOS.

Ans: Features of MS-DOS include:

  1. MS-DOS is a command-line-based operating system that lacks a graphical user interface. To work, it necessitates the use of text and codes.
  2. In MS-DOS, file names are limited to eight characters, with a three-character suffix indicating the file form.
  3. It is a 16-bit operating system.
  4. Since MS-DOS does not allow multitasking, you can only run one process in RAM at a time.

3. What are DOS Commands? Also, explain its types.

Ans: DOS Commands are small programs and instructions designed to accomplish a specific mandate. Every DOS command works uniquely. There are two types of commands in DOS:

  1. Internal Commands.
  2. External Commands.

Internal Commands: The shell consists of commands that are entered into the device memory during booting. Internal commands cannot be interpreted since there is no external file in the machine. These commands are not viewable, editable, or deletable. DIR, MD, CD, TIME, DATE, COPUY, COPY CON, TYPE, and others are some of the most widely used internal commands.

External Commands: Some commands are not part of the shell and are not built into DOS. When these commands are executed, they are loaded into memory. These commands are found in files with the extensions exe, bat, and com. As a result, these commands can be viewed, copied, modified, or removed. XCOPY, FORMAT, COPY, PRINT, SYS, EDIT, TREE, SORT, PROMPT, and other external commands are widely used.

4. Name a few MS-DOS commands you've used.

Ans: MS-DOS commands include:

  1. CD/CHDIR (Change Directory) - In DOS, it's used to change and navigate through directories.
  2. CLS (CLRSCR) - It is used to clear the contents of the screen.
  3. COPY - It's used to copy an entire file from one place to another. It is also used to duplicate an existing file.
  4. DATE - It displays the current device date and asks the user to enter a new one.
  5. DEL (ERASE) - It is used to erase one or more files from the device permanently.
  6. DIR - It displays a list of files that are accessible in the current or parent directory.
  7. EDIT - It's a full-screen text editor for viewing, creating, and editing text files.
  8. HELP -It assists with other DOS commands by listing a brief clarification.
  9. MOVE - It's used to move one or more files or folders from one place to another.
  10. REN - It's used to rename folders and files.

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